VeriSafe™ AVT Sensor Lead Connection Options

NOTE: See VeriSafe AVT Instruction Manual for complete Installation Instructions and Commissioning Checklist1) Where to Install
The VeriSafe AVT is to be installed at the point in the circuit where you would normally test for voltage. If
there are more than one energy sources within the enclosure, multiple AVTs will be needed to test eachsource (each AVT is designed to test one energy source from one to three phases).

2) General Information
The VeriSafe AVT is provided with 14 AWG Class K stranded sensor leads. Ferrules or terminals arerecommended for all sensor lead terminations to ensure reliable connections with stranded wire.
There are four sets of color-coded sensor leads (three conductors and ground). Each set of sensor leads has adetection lead and a termination lead. The detection lead is used to detect voltage and the termination leadis used to verify that the detection lead is in contact with a conductor. The termination lead does not detect
voltage. There are no labels distinguishing the detection and termination leads because it is critical that they
are both properly terminated.
Sensor leads for each phase and ground must not be mechanically terminated at the same point for the AVTto function properly (see Figures 1 and 2). For example, if the termination shown in Figure 2 fails and thesensor leads remain in contact with each other (yet no longer in contact with the conductor), the installation
test will be defeated for that set of sensor leads which may lead to inaccurate results from the AVT. If thedetection lead is not contacting a conductor, the result of the installation test will prevent the AVT fromreturning a green absence of voltage indication.

Figure 1 Example of properlyterminated sensor leads. Leads are
not mechanically connected, andtermination points are insulated.

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Figure 2 Terminating both sensor
leads at the same point may resultin inaccurate AVT results.

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There is no maximum distance limitation between the two leads on each phase, however there should not be
any circuit elements (ex. Circuit breaker, fuse, VFD, switch or similar control devices etc.) installed between
each pair of sensor leads. (see diagram below)

Circuit Breaker or any
other circuit elements
should NOT be placed
between each set ofsensor leads

Install BOTH sensor
leads for each phaseon either the line orload side

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When installing an AVT, care should be taken to ensure that sensor leads used to connect the AVT to the lineor bus and to ground shall not be any longer than necessary and shall be routed to avoid sharp edges, pinchpoints or mechanical damage. Do not extend the sensor leads with a splice that exceeds the overall conductor
length of 10 feet from the isolation module to the sensor lead tap termination (to comply with NEC tap rule,
the AVT can be treated as a feeder circuit per NEC article 240.21 (B) (1) (b) exception. This rule allows a tap ofno more than 10 feet on a feeder circuit without the need for overcurrent protection).
Secure the sensor leads to the power conductor or another nearby rigid feature to prevent movement of thesensor lead in the event that the termination point failed. Sensor leads can be secured using cable ties,clamps, mounts, or tape. The sensor leads should be secured at multiple locations, including near thetermination point. (see the diagram below)

In addition, the sensor lead terminations should be inspected periodically, like other critical terminations
inside an electrical enclosure, to ensure they are tight, and the sensor leads are secure.
Always insulate the sensor lead termination points. A variety of methods can be used to insulate thetermination. Some connectors have insulating housings, others have accessories to insulate the connector.
Insulating tape or heat shrink can also be used.
Use approved connection methods and follow local codes and standards when terminating the sensor leads.

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P: 800-777-3300| Page 33) Common Methods for Terminating VeriSafe AVT Sensor Leads
This section describes some of the common methods used to terminate VeriSafe AVT sensor leads. Othermethods or combinations of these methods can be used as long as they comply with the VeriSafe AVT
Instruction Manual and local installation codes and standards.

VeriSafe Insulation Piercing Connector
Typical Installation

Considerations• Single connector is used to terminate two sensor
leads, allowing for a smaller connector footprint
and faster installation• Insulation piercing connectors do not compromise
the integrity of the conductor• AVT sensor leads must have ferrules applied at alltermination points
SCCR Impact
No Impact
Limitations•If extending the sensor leads, the total length of thesensor leads plus the sensor lead extensions mustbe less than 10ft from the isolation module to theconnection point on the power conductor (tocomply with NEC tap rule)

VeriSafe Insulation Piercing Connector Kit

Each kit includes three connectors & ferrules to install one AVT

VS-CKP14-6

Part Number

Product Description
VeriSafe AVT Insulation Piercing Connection Kit for
tapping 14 to 6 AWG conductors.

VS-CKP4-000

VeriSafe AVT Insulation Connection Kit for Tapping 4 to
3/0 AWG conductors.

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Insulation Piercing Connector with Terminal Block
Typical Installation

Considerations• If the AVT sensor leads are not compatible withinsulation piercing, insulation displacement, or “hottap” style connectors, use of a terminal blockprovides a means of converting the AVT sensor
leads to a wire type that is compatible with theseconnectors.
• Select proper extension wire that is compatible withthe specific insulation piercing connector for thesensor lead extension.
• Ensure that the insulation piercing connector will
not compromise the integrity of the conductor.
• AVT sensor leads must have ferrules applied at alltermination points
SCCR Impact
No impact
Limitations•NOTE: This installation method is recommended
for run conductors larger than 3/0 (Panduit IPC
connectors are compatible with class K sensor
lead wiring and cover 14 to 3/0 AWG runconductors.)•The total length of the sensor leads plus the sensor
lead extensions must be less than 10ft from theisolation module to the connection point on thepower conductor (to comply with NEC tap rule)Must use separate connector for each sensor lead

Sicame has part # TTD0810XF (image below) thatcovers 3/0 to 750MCM and accepts one 14AWG
tap. A terminal block is needed to convert to thesensor lead stranding from class K to a stranding
compatible with the Sicame connectors (ThisSicame SKU is not compatible with class K wiringof the VeriSafe). Also, you will need six Sicame
connectors to install an AVT (Each Sicame
connector only accommodates one 14 AWG tap)

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P: 800-777-3300| Page 5Power Distribution Block (PDB)
Typical Installation

Considerations• Ideal for new installations where space for thepower distribution block is more likely to beavailable.
• Select PDBs with ports capable of accepting 14
AWG AVT sensor leads.
• AVT sensor leads must have ferrules applied atall termination points
SCCR Impact••

If a power distribution block (PDB) is added for
VeriSafe installation and not considered in theSCCR calculations, because the run conductor isspliced on either end of the PDB, the added PDB
has become part of the power circuit and may
affect the SCCR.
If the power distribution block (PDB) is alreadypresent in the circuit and considered in theSCCR calculations, there is no impact to theSCCR rating.
NOTE: The AVT is not part of the power circuit,as it only acts as a sensing/monitoring device
and does not carry power.

Limitations••••

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If extending the sensor leads, the total length ofthe sensor leads plus the sensor lead extensions
must be less than 10ft from the isolation
module to the connection point on the power
conductor (to comply with NEC tap rule)Space must be available in panel to install thePDB.
Sensor leads must not be terminated in thesame port.
For applications that require larger than 2/0
AWG conductors, most power distribution
blocks will not have ports sized to accept boththe larger conductor and smaller 14AWG AVTsensor leads.

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Multi-tap Lugs
Typical Installation

Considerations• AVT may be installed on the line side or load side ofthe disconnect• It may be possible to terminate one AVT sensor leadon the load side lug of a disconnect and the other
AVT sensor lead on the upstream lug of the nextcomponent. If this method is used, there must not
be any circuit elements installed between the AVTsensor leads.
• Lugs must be rated to accept multiple wires andcompatible with the 14 AWG AVT sensor leads• Multi-tap lugs can be added or changed on someelectrical disconnects• AVT sensor leads must have ferrules applied at all
termination points
SCCR Impact••

Changing or adding a lug may impact SCCR
If the lugs are already present in the circuit andconsidered in the SCCR calculations, there is noimpact to the SCCR rating.
NOTE: The AVT is not part of the power circuit, as it
only acts as a sensing/monitoring device and does
not carry power.

Limitations•••

PANDUIT – FOR PUBLIC USE|If extending the sensor leads, the total length of thesensor leads plus the sensor lead extensions mustbe less than 10ft from the isolation module to theconnection point on the power conductor (tocomply with NEC tap rule)
AVT sensor leads must not be terminated in thesame port.
Lugs must be compatible with the electrical
disconnect.

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Busbars
Typical Installation

Considerations• Sensor leads may be terminatedusing barrel post lug, ring terminals,
bolted connections or othercompliant methods• Carefully route and secure sensorleads• Consult manufacturer before making
modifications to busbars• AVT sensor leads must have ferrules(or terminals) applied at all
termination points
SCCR Impact
No Impact

Limitations••

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If extending the sensor leads, thetotal length of the sensor leads plus
the sensor lead extensions must be
less than 10ft from the isolation
module to the connection point on
the power conductor (to comply withNEC tap rule)Sensor leads must not be terminatedunder the same screw.

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Split Bolt Connectors
Typical Installation

Considerations• Sensor leads must be secured to thepower conductor• Connections must be insulated• AVT sensor leads must have ferrules
applied at all termination points
SCCR Impact
No Impact
Limitations•PANDUIT – FOR PUBLIC USE|

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If extending the sensor leads, thetotal length of the sensor leads plus
the sensor lead extensions must be
less than 10ft from the isolation
module to the connection point on
the power conductor (to comply withNEC tap rule)

P: 800-777-3300| Page 9Other Examples•

Siemens control tap (as shown Siemens part number is
3VA91430JH12) that is compatible with one bolt
connection yet allows for two separate “ports” separated
by a set screw.

•Sensor leads are not tied together and separated by theterminal screw•

AVT sensor leads must have ferrules applied•

Utilize dual hole lugs. Connect sensor leads with ringterminals.
Each AVT sensor lead must be terminated at a separatepoint.
Panduit product series dual hole lug “LCC” – link tocatalog cut sheet••\PANDUIT – FOR PUBLIC USE|•

Rockwell terminal adapters (SKU as shown is 1494UALT31) with a control wiretap may be used on line or loadside of the Rockwell 194U disconnects from 30-600A.

•An acceptable method for terminating one of the AVTsensor leads. Note terminal adapters are sold in packagesof 2.

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Other Examples•VeriSafe AVT installation with one of thephase sensor leads terminated on the loadside lug of the disconnect and the othersensor lead terminated on the line side lug ofthe next component in the circuit.

•Example of a dual disconnect adapter –reference Panduit part number -- D-250A-C**Panduit example D-250A-C

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VeriSafe with Parallel Conductor Runs
Some applications may use multiple cables per phase. In these cases, it is recommended to install each sensor
lead on a separate cable for redundancy. The diagram below provides additional guidance regarding
recommended terminations for parallel conductors.

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